Type-writing machine.



L. R. RQBERTS.

TYPE WRITING IACHINE. \PPLICATION mm at". 3'0. 191:.

1,230,517. PatentedJune 19, 1.

ZSIIEETHNE WITNESS? L. ""52"".

L. R. ROBERTS. TYPE WRITING MACHINE. APP'LICATION HLED sumac, 1913.

1,230,5 1 7. Patented June 19, 1917. 2 SHEETS-SHEET 2.

Rutherford, in the; county. of Ber an! a nonm'rs,

warren conrm, or

UNITED STATES PATENT OFFICE. Y

01 31111111232031), NEW JERSEY, ABSIGNOB 'ro unnn'awoon TYPE- rmw Yonx, N. Y., A CORPORATION or nanawaan.

Be it known that I, LYMAiw R. Ronnn'rs, a citizen of the United States, residing in y on and State ofnNew Jersey, have m-vente certain new and useful "1m ,rovements in Type Writing Machines, 'o

l which the following is a specification.v v f My invention relates't'o typewritirrigmachines and particularly to. an improve form andarra 'gement of mechanism for shifting the, latent T e platen framemay' be pivoted on the shiftable toupper and lower case positions mounted ,on' arms or; levers to engage the carriage and comprising and lift the platen frame, and'a depressib uide rail mounted on said-arms in rear of t e carriage, a nontraveling shifter in,

- rail beiilgmovable downwardly by means of a shift key or ke ,s. A simple and practical formof platen s ifting'mechanism is thereby obtained. and the parts are convenient y disposed so as not to. encroach on space required forother' mechanism.

I The shifter may be in the form of a roller running on 'said rail, and the roller maybe mountedin a head adjustably connected to a wertical link guided through a bracket on the machine frame, an adjustable stop on the link engaging said bracket to limit the downward movement; saidalink connected at its lower end toa rock arm fixed to a rock shaftica rrying additional rock arms actuated by, shi t key levers.

Other features and advantages will hereinafter appear. I I p In the accompanying drawings, Figure l is a perspective rear "typewritin'g machine embodying my inventlon', the machine frame being partly broken .frame 2, being supported and guided gbes I gar ven'ti-on, being omitte away, and various portions of the mechan isrn, which form no t of the present in- Fig. ,2 is an end elevational'view looking from the left-hand end of the machine.

I Fig. 3 is asimilarview, but with portions omitted and showing the position of parts when the shiftkey is depressed.

The carriage 1 is mounted ma machine tween guide ra1ls 3, which, together with the carriage, form rac eways I for antifriction rollers j. A rotary. platen 5, secured to. an

view of a against engagement with said be actuated by shift keys 23 on the axle 6 to which are attached hand wheels 7 is mounted on a platen frame comprising end plates 8 and 9, in which the platen axle 1s ournaled, said plates being connected tie-rods 10 and 11,. The ends of the rod 10 extend beyond the end plates 8 and 9 .to form pivots seated in recesses- 12 in end brackets '13 forming part of the carriagel. The platen frame is s iftable about. theaxis of the rod 10 as a center, to upper and lower case positions, the platen axle 6 being guided in arc-shaped slots 14' in the'brackets 13, said axle 6 being seatedin the bottom of said slots when the platen is in lower-case osition. Type-bars 15 carrying u per and owercase types 16 and 17, are a apted to be swung about their pivots 18 by the usual key-operated mechanism, to bring the types the front'face of-the platen.

The platen is shifted by means of a rock frame, comprising horizontally-dis osed end arms or levers 19, pivoted at 20 to ugs 21 on the carriage, said arms connected at their rear ends by a tie'rod 22 located at the rear of the carriage and extending in the direction' of the carriage travel. The forward ends of the arms 19 extendbeneath the'tie rod 11, so that when the-rod 22 is pulled downwardly to tilt the frame 19, 22, the

platen frame is shifted'upwardly to bring the platen to uppenoasc position.

The platen-s lfting frame is adapted to orward ends of key levers 24 pivoted on a rod fixed at its ends in the machine frame 2.

Therear ends of the key levers carry antifrictionrollers 26, bearing against cam'surfaces 27 formed on rock arms 28 fixed to a rock shaft 29 journaled in the machine frame.

Also fixed to the shaft 29, preferably about-midway-between the ends of the madisposed link 31, the upper end nthreade'd into a head 32 carryin chine, is a rock arm 30 extending rearwardly and at its'fre'e end connected to :averticallyof which is a roller 33, which, during the travel of t e carriage, runs on the upfi 1'. surface of the rod or ide =rail'22. be head 32 is forked or if urcated to receive the roller 33 and the .rod 22, so that accidental disconnection of the rod 22 from the head 32-is prevented. The link 31 extends through an opening in a bracket 3i on the machine frame, whereby Patented line 19, 1917.

it is supported and guided. The threaded connection of the head 32 to the link 31 perthe ro mits the effective length of the link to be adjusted. The shaft 29 with its connected rock arms forms a rock-frame operable by each shift key separately to transmit motion to the platen-shifting frame.

. A stop-nut on the threaded portion of the link 31 by striking thebracket 34 limits the downward movement of the link 31 and thereby determines the up er case position of the laten; the nut 35 being adjustable on d and locked in position by a lock nut 35.. A washer 36 of leather or other suitable material may beinterposed between the nut 35 and the bracket if desired, to act as a buffer and sound-deadener. The cam surfaces 27 may be formed to obtain any desired movement of the laten relative to the movement of the shift eys. Springs 37 on the carriage bear upwardly on the tie-rod- 11 to artially counterbalance the weight of the platen, and the shift keys are returned by springs 38.-

When a shift'key is depressed, the shaft 29 is rocked and pulls the link 31 downwardly, thereb rocking the frame comprising the r -22 and arms 19 about the pivots 20 and swinging the platen frame about the axis of the rod 10; the platen being thus carried from lower case position (Fig.

2) to upper case position '(Fig. 3). The rod 22 on which the roller 33 runs being parallel with the direction of the carriage travel, the shifting movements of the laten are the same regardless of the position of the carriage; ariations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my claim 1: aftypewriting machine, the combination, with a carriage, of a tiltable platen frame pivoted on said carriage and comprising endplatesand rods connecting the-same, one of-said rods disposed in rear of the other rodand constituting the axis about which invention, I

said frame tilts; a shifting member pivoted intermediate its ends onsaid carriage and extending forwardly beneath and into direct engagement with said other red; and means for depressing the rear portion of said shifting member and thereby elevating its for; ward portion, so as to'tilt said platenframe upwardly into upper case position. I

2; In a typewriting machine, the combination, with a carriage; of a tiltable platen frame pivoted on said carriage and comprising end plates and rods connecting the same,

one of said rods, disposed in rear of theotherrod and constituting the axis about which said frame tilts; a shifting member v pivoted intermediate its ends on said car-' riage and having an arm which extends forwardly beneath said other rod and upon rail, a vertically shiftab e r gage beneath the platen frame and shift the which the latter rests, so as to an said frame, and also having a rearwar y-ex'tend- 'ing arm; and means connected to exert a downward pull upon the second-named am, so as to depress the same and thereby elevate the first-namedarm, to tilt'said platen frame upwardly into upper case position.

3; In a typewritmg machine,- the combisition to engage said bracket and thereby limit the movement of the 4. Ina typewriting machine, the combination of a carria e, a platen shiftable thereon, a platen-shiftm frame tiltablymounted on the carriage an com risilg a horizontal ried thereby and runmng bracket on the machine framezin which said rod is guided, astop adjustable on'said rod, and a cooperating counter-stop on the machine frame. Y

a roller can? on saidrail, 9'

5. In a typewriting machine, the' combig nation of a carria a platen shiftable thereon, a platen-shiftln frame tiltabl mounted on the carriage an comprising a orizontal rail, a. vertically shiftable roda roller carried thereby and running on said rail, a bracket on the machine frame in which said rod is guided, a'stop adjustable 'onsaid rod,

' a coiiperatin'g counter-stop on. the machine frame, and a buffer interposedrbetween "said stop and counter-stop.

6. In a typewriting machine, the combination with a carriage and a platen frame pivoted thereon, of a platen rotatable on said frame, the carriage formed with curved guides concentric with the 'pivot of the laten frame and in which the platen axle is supported and guided, a laten shiftin frame mounted .to swin on. t e carriage an arranged to lift the p aten frame, a shift key, and means operated thereb running connection with said shi ting frame behind the carria e for operating said shift ing'frame to shi the platen.

7. In a typewriting machine, the combi.

having a nation with a machine frame and a carriage Y mounted for travel thereon, of a platen frame pivoted on the. ca'rria e, a platen having an axle journaled in t e platen frame forward of the platen frame pivot, the carriage ,being provided with curved guiding slots concentric with the platen frame pivot, and in which the platen axle is guided, said slots forming asupport-for the platen when in lower case position a platen shiftin frame pivotally mounted on the, carriage an extending forwardly from its pivot to en 1,ao,517 a latter when the shifting frame is rocked, said shifting frame comprising a rod at tie rear of the carriage and. extending in the direction of the carriage travel, independ 'ently operable shift, keys, and means oper chine frame and having a running connec-' tion with the tilting frame for actuating the latter while the carriage is atany point in its travel, said actuating device and machine frame having cooperating stops to limit the movement of the actuating device and there by determine the shifted position of the platen, one of said stops being adjustableto vary the stop position of said actuating device to thereby adjnstably vary said shifted position of the platen. v

9. in a typewrring machine, the combinatlon of a carriage; a platen shiftable thereon; a platen-shiftingframe tiltably mounted on the carriage and comprising a horizontal rail; vertically shiftahle rod a roller carried thcrelt)y and running on said rail; a rock shaft ournaledinthe machine frame; a pair of rock arms secured to said shaft, one of said arms extending forwardly and the other rearwardly, the last-name arm having the lower end of said rod connected thereto; and a shift key pivoted intermediate its ends in said machine frame and having its rear end operativel engaged with the forwaially-extending roe arm.

10. In a typewriting machine, the combination of a carriage; a platen shiftable thereon; a platen-shifting frame tiltably mounted on the carriage and comprising a horizontal rail; a vertically shift able rod; 9.-

roller carried thereby and running on said rail; a rock shaft jonrnaled in the machine frame; a forwardly-extending rock arm secured to said shaft and having its front end provided with a cam surface; a shift key pivoted intermediate its'ends in said machine frame and having its rear end provided witha roller to engage said camsurface, so as to rock said shaftwhen said key is depressed; and a connection between said shaft and said. rod for loweringthe latter when said shaft is rocked.

11. In a typewritingmachine, the combination of a carria e; .a platen shiftable tllGI'BOIl; a platen-s ifting' frame tiltably mounted on the carriage and com risin a horizontal rail; a vertically shiftab e I'OL a roller carried thereby and running on said rail; a rock shaft journaled in the machine frame; a pair of rock arms secured to said haft, one of said arms extending forwardly and the other rearwardly; the rearwardlytending rock arm fixed to it, said rod con-' extending a rm having the lower end of said rod connected thereto, and the forwardlyextending arm being provided with a, cam surface; and a shift key pivoted intermediate its ends in said machine frame and having its rear end provided with a roller to en" gage said cam surface, so as to rock,

shaft when said keyisidep ressed.

1?. In a typewrlting machine, the combinatlon of a carriage; a platen shiftable thereon; a platen-s "ifting frame tiltably mounted on the carriage; a rock shaft journaled inthe machine frame; a pair of forwardly-extending rock arms fixed to said shaft adjacent its 0 posite ends, each arm having its front en provided with a cam surface; a pair ofindependently-operable shift keys pivoted intermediate their endjsdn saidmachine'frame, each key having a roller at its rear end over which the camisurfa'ce onfthe adjacent rock arm' projects, so as to rock said shaft Wheneither key is depressed; L

and a connection between said shaft and said shifting frame, inclliding a rock arinvfixed to said shaft intermediate the first-named rock arms, for tilting said framewhen said shaft is rocked.

a 13. In a typewritin machine, the combination of a carria of a platen shift'able thereon; a laten-s i ing frametiltably mounted on t e carriage; a rock shaft journaled in the means frame: a pair jof forwardly-extending rock arms-fixed to'"said shaft adjacent its opposite ends, each arm having its front end provided with 'a cam surface; a pair of independently-operable shift keys pivoted intermediate thelr ends in said machine frame, each key having a roller at its rear' end over which the cam surface on the adjacent rock arm projects, so as to rock said shaft/when either key is depressed a rearwardly-extending rock arm fixed to said shaft between said forwardlyextending arms; and a vertical connection between said rearwardly'extendin arm and the rear portion of said frame or tilting said frame when said shaft is rocked.

14. In a typewriting machine, the combination of a carria e; a platen shiftable thereon; a platen-s lifting frame tiltably mounted on the carriage; a vertically-shiftable rod having a running connection with said frame for shifting the. latter and the platen into upper-case position when, said rod is lowered; a rock shaft ournaled ln'the machine frame and having a rearwardly-exnected at its lower end to said arm; a shift key connected to rock said shaft and thereby lower said rod; and coiiperatin stops on said rod and the machine frame or limitin the downward movement of the rod, an thereby determining the upper-case position of the laten. i 15. n a typewriting machine, the combination of a carriage; a platen shiftable thereon; a platen-shifting frame tiltably mountedon the carriage; a vertically-shiftable rod having a runnin connection with said frame for shifting t e latter and the platen into upper-case position when said rod is lowered; a rock shaft journaled in the machine frame and having a'rearwardlyextending rock arm fixed to it, said rod connectedat its lower end to said arm a shift key connected to rock said shaft'and thereby lower said rod; a guide bracketin which said rod is slidably engaged secured to the machine frame; and a stop on said rod 'engageable with said bracket for limiting the downward movement of the rod, and thereby determining the upper-case position of the platen. I

'16. In a typewriting machine, the combination, with a carriage; of a platen frame pivoted on said carriage; a platen havin its axle journaled in said frame forward 0 the pivot thereof, said carriage being provided with curved guide slots concentric with said pivot and forming a support for the platen when in lower-case position; a rocking platen-shifting frame mounted on said carriage and extending forwardly beneath the platen frame into position to engage and lift said platen frame and platen into uppercase position when said shifting frame is connected with said shifting frame in rear of its pivot for depressing the rear end thereof and raising the front end, so as to cam said platen frame and platen upwardly into u per-case position.

18. n a typewriting machine, the combination, with a carriage, a platen frame pivoted on said carriage, and a platen mounted in said frame; of a rocking latenshifting frame comprising curved en members pivoted at an intermediate point thereof to said carriage, and a rod connectin the rear portions of said members, said p aten frame resting, in advance of its pivot, upon 7 the forward portions of said members; and means acting upon said rod for depressing platen upwardly into upper-case posi nation, with a carriage; of a tiltable platen} frame pivoted on said carriage and comprising end, lates and rods connecting the same, one 0 said rods disposed in rear of the other rod and constitutin the axis about which said frame tilts; a shi ing cam pivoted intermediate itsends in said carriage and having its front portion extending beneath the forward frame rod for engagement therewith; and means for de ressing the rear. end of said cam and there y elevating its front end, so as to cam said platen frame upwardly into upper-case position.

20. In a typewriting machine, the combination, with a carria of a tiltable platen frame ivoted .on sai carriage and comprising en plates and rods connecting the same,

one of said rods disposed .in rear of the other rod and constituting the axis about which said frame, tilts; a rocking platen-shifting frame pivoted in said carriage at an intermediate point thereof and com rising curved end members whose forwar portions extend beneath the forward platen frame rod 7 for enga ement therewith; and means connected with said shiftin frame in rear of its pivot for depressing t e rear end thereof and raising the front end, so as to cam said platen frame upwardly into upper-case position.

21. In a typewriting machine, the combination, with a carriage; of a tiltable platen frame pivoted on said carriage and comprising end plates and rods connecting the same, one of said rods disposed in rear of the other rod andconstituting the axis about which said frame tilts; a rocking latenshifting frame comprising curved en members pivoted at an intermediate point there.-

of to said carriage, and a rod connecting therear portions of said members, the forward case position. v p

p LYMAN R. ROBERTS. Witnesses: Jnmns Ducxs'rmm, GEO. N. Narma- 

